Google has updated its data-saving app Datally with several new features, including the ability to limit how much data your friends and family can use when they borrow your phone. No more sneaky streaming sessions gobbling up your allowance without your permission.

You can also set daily usage limits, helping you portion out your data throughout the month so you don't run out partway through, and Google will soon add warnings so you know when it's time to start cutting back on the video...